//
//  UserAccount.swift
//  weibo-01
//
//  Created by 韩家奇 on 15/11/8.
//  Copyright © 2015年 hanjiaqi. All rights reserved.
//

import UIKit
//用户账户模型
class UserAccount: NSObject,NSCoding {
    /// 用于调用access_token，接口获取授权后的access token
    var access_token: String?
    //
    /// access_token的生命周期，单位是秒数
//    var expires_in: NSTimeInterval = 0
    //从服务器获得过期时间后,立即计算准确的日期
    var expires_in: NSTimeInterval = 0 {
        didSet {
            //计算过期日期
            expiresDate = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    //过期日期
    var expiresDate: NSDate?
    /// 当前授权用户的UID
    var uid: String?
    
    //用户昵称
    var screen_name: String?
    //用户头像
    var avatar_large: String?
 
    //通过KVC赋值
    init(dict:[String:AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
        
    }
    //重写description方法
    override var description: String {
        let keys = ["access_token","expires_in","expiresDate","uid","screen_name","avatar_large"]
        return dictionaryWithValuesForKeys(keys).description
    }
    //归档 当前对象保存到磁盘前,将对象编码成二进制数据  和网络的序列化很相似
    //键值
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeObject(expiresDate, forKey: "expiresDate")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(screen_name, forKey: "screen_name")
        aCoder.encodeObject(avatar_large, forKey:"avatar_large")
    }
    //解档 从磁盘加载二进制文件 转换陈对象时调用 跟网络的反序列化相似
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expiresDate = aDecoder.decodeObjectForKey("expiresDate") as? NSDate
        uid = aDecoder.decodeObjectForKey("uid") as? String
        screen_name = aDecoder.decodeObjectForKey("screen_name") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
    }
    
}
